Printing process by means of supports with rough surfaces



June 5, 192s. i 1,672,319

-\ N. JACOBSEN PRINTING POCESS BYv MEANS OF SUPPORTS WITH ROUGH SURFACES Filed Aug. 5, 192s 2 sheets-sheet 1 z ,H Imimmummmmllmmlmllum @n mm f I*"i1If!IN1HIllmllllffllwmmnrim A w Il j June5, 1928.

N. JACOBSEN PRINTING PROCESS BY MEANS OF SUPPORTS WITH ROUGH SURFACES .Filed Aug. 5, 192e 2 sheets-sheet 2 n .man

Patented une 5, 1928.

UNITED swimsy l'zirulvr'g oF'FICE.

NORMAN JACOBSEN, or PARIS, FRANCE.

PRINTING PROCESS BY MEANS 0F SUPPORTS WITH Rouen ySURAcns.

Application lled August 5, 1926, Serial No. 127,44, and in France August 12, 1925.

The present invention has for its subject a process for the preparation, with a support (such as a sheet of paper) with a rough surface, .a ,sheet by means of `which it is possible y 5 to print drawings, engravings and so forthy having the appearance of lithographs or wood engravings. In the preferred method of carrying out the invention the support with the rough surface in questionis simply formed by a Sheet of sand .paper or other similar product grain. Such a Surface', when inked `by means of a roller coated with printing ink in accordance with the method usually employed for lithographie printing, property of rejecting thel ink, the latter only adhering in very Small quantities to the grains which are distributed over the surface of the support.

Among the objects of the invention :are to provide a printing means comprising a sheet having portions composed of exposed sand paper and other portions `consisting of a smooth substance embedded |in and overlying the ,sand paper. This smooth substance is preferably a fatty body and, in the improved embodiments of the invention, either wax grease may be employed.

A further object is to provide a method of preparing a rough-grained surface suitable for printing, consisting in drawing the drawing to be produced by means of a fatty substance on a surface and transferring the drawing thus produced by pressure to the rough-grained surfaceof sand paper so as to render this surface vsmooth `and continuous at the portions corresponding with the black portions in the print to be obtained.

The accompanying drawing shows diagrammatically various methods of carrying out the'vprocess forming the subject of the invention. v y

In the most simple form of carrying out the invention for the purpose of obtaining prints having the appearance of lithographs there are formed on the rough grained surface of the sand paper by means of a grease pencil smooth and continuous lines or Surfaces capable of retaining printing ink. Figure l shows to an enlarged scale an example of this method of carrying out the with a sufficiently fine' has the -in/ the same manner.`

invention. Figure 2 yisa section on the line;

1 TheJ ed vwith gelatine by means of liquid wax, the drawing in question beingv made by means ofv any suitable instrumentand A the` rwax is maintained at the necessary degree of fluidity by means which are also known. The drawing thus obtained'is transferred to the i rough grained surface of the sand paper by Simple pressure erted by means of the printing machine it- -self.- The drawing ymay also an ordinary sheet of paper and then all the. with wax;

which isy conveniently ex'- be drawn on lines of the drawing are run over the reproduction of the drawing is effectedl In order to obtain an efficient drawing whether the drawing has been drawn on gelatine or on ordinary drawing paper the lgelatineor the paper, before making the draw-ing in wax, is preferably coated with a suitable adhesive substance. Egg albumen is very suitable for this purose and givesv the best results. j

In order to obtain prints having completely white portions, for the purpose of obtaining effects opposite to black or White entirely Similar to those obtained by a wood engraving, the portions which are to remain whitek are cut from the sheet of Sand paper as shown at b in Figure 3. When the Sheet is mounted onv a block of wood fory printing, this block, as is well understood, Should be notched and hollowed at the pointV of the A.openings formed in the sheet lof sand paper. A similar result may be obtained by treating these points. v It will be understood thatthe invention thev for the production. of env` y be reproduced vis drawn on .a sheet of gelatine or on a sheet of paper coat for example be scraped away or hollow' portions may beformed at` enables prints of any colour' to -be obtained or even multicolour prints by means of a number of sheets suitably prepared for this purpose and carefully arranged during printing in the well known manner.

Having thus described my invention, what I claim as new and desire to secure by lLetters Patent isi-e l. A method of preparing` a rough grained surface suitable for printing consisting in l drawing the drawing to be reproduced by means of liquid wax` on a surface, and then transferring` the drawing thus produced by pressure to the rough grained surface of glass paper so as to render this surface smooth and continuous at the portions corresponding with the black portions in they portions corresponding With the black portions in the print to be obtained.

` 3. A printing means comprising a sheet having portions composed of exposed sand paper and other portions consistingof a smooth substance embedded in and overlying' the sand paper. t

4. A printing'n'ieans comprising a sheet having portions composed of exposed sand:

paper and other portions consisting of a fatty body embedded in and overlying the sand paper. Y

5. A printing means comprising a sheet having portions composed of exposed sand paper and other portions consisting of wax embedded in and overlying the sand paper.

6. VA method of preparing a rough-grained surface for printing, consisting in drawing the drawing to be produced rby means of a fatty substance on surface and then trans-` ferring the drawing thus produced by pressure to the rough-grained surfaceof sand paper so as to render this surface smooth and continuous at the portions corresponding with the black portions in the print to be obtained;

ORMAN JACOBSEN. 

